Craft\AmNavService::_buildNavHtml PHP Method

    private function _buildNavHtml($nodes, $parentId = 0, $level = 1)
    {
        // Do we have a maximum level?
        $maxLevel = $this->_getParam('maxLevel', false);
        if ($maxLevel !== false && $level > $maxLevel) {
            return false;
        }
        // If we don't find any nodes at the end, don't return an empty UL
        $foundNodes = false;
        // Create UL
        $nav = '';
        if ($level == 1) {
            if (!$this->_getParam('excludeUl', false)) {
                $id = $this->_getParam('id', $this->_navigation->handle);
                $class = $this->_getParam('class', 'nav');
                $nav = sprintf("\n" . '<ul%1$s%2$s>', $id !== false ? ' id="' . $id . '"' : '', $class !== false ? ' class="' . $class . '"' : '');
            }
        } else {
            $nav = sprintf("\n" . '<ul class="%1$s">', $this->_getParam('classLevel' . $level, 'nav__level' . $level));
        }
        // Add the nodes to the navigation, but only if they are enabled
        $count = 0;
        foreach ($nodes as $node) {
            if ($node['parentId'] == $parentId && ($node['enabled'] || $this->_getParam('overrideStatus', false))) {
                $count++;
                $foundNodes = true;
                // Get children
                $children = $this->_buildNavHtml($nodes, $node['id'], $level + 1);
                // Set node classes
                $nodeClasses = array();
                if ($children) {
                    $nodeClasses[] = $this->_getParam('classChildren', 'has-children');
                }
                if ($this->_isNodeActive($node)) {
                    $nodeClasses[] = $this->_getParam('classActive', 'active');
                }
                if ($this->_getParam('ignoreActiveChilds', false) === false) {
                    if ($this->_isChildActive($nodes, $node['id']) && !in_array($this->_getParam('classActive', 'active'), $nodeClasses)) {
                        $nodeClasses[] = $this->_getParam('classActive', 'active');
                    }
                }
                if ($level == 1 && $count == 1) {
                    $nodeClasses[] = $this->_getParam('classFirst', 'first');
                }
                if (!empty($node['listClass'])) {
                    $nodeClasses[] = $node['listClass'];
                }
                // Set hyperlink attributes
                $hyperlinkAttributes = array('title="' . $node['name'] . '"');
                if ($node['blank']) {
                    $hyperlinkAttributes[] = 'target="_blank"';
                    if ($this->_getParam('classBlank', false) !== false) {
                        $hyperlinkAttributes[] = 'class="' . $this->_getParam('classBlank', '') . '"';
                    }
                }
                if ($this->_getParam('linkRel', false) !== false) {
                    $hyperlinkAttributes[] = 'rel="' . $this->_getParam('linkRel', '') . '"';
                }
                // Add curent node
                $nav .= sprintf("\n" . '<li%1$s><a href="%2$s"%4$s>%3$s</a>', count($nodeClasses) ? ' class="' . implode(' ', $nodeClasses) . '"' : '', $this->_parseUrl($node), $node['name'], ' ' . implode(' ', $hyperlinkAttributes));
                // Add children to the navigation
                if ($children) {
                    $nav .= $children;
                }
                $nav .= '</li>';
            }
        }
        if ($level == 1) {
            if (!$this->_getParam('excludeUl', false)) {
                $nav .= "\n</ul>";
            }
        } else {
            $nav .= "\n</ul>";
        }
        if ($foundNodes) {
            return TemplateHelper::getRaw($nav);
        } else {
            return false;
        }
    }